Alicanto

The alicanto, in Chilean mythology, is a nocturnal flightless bird of the Atacama desert, which is said to run at night with glowing outspread wings, glittering in the gold or silver color deriving from the precious ores it supposedly eats.

[1] A similar description can be found paraphrased in the English-translated version of Book of Imaginary Beings (1969) by Argentine author Jorge Luis Borges, under the chapter of "Fauna of Chile",[2] which was one of four chapters not found in the original Spanish version by Borges but expanded in the English translation.

[4][1] Legend says that the alicanto's wings shine at night with beautiful metallic colors, and their eyes emit strange lights.

[4] Also the cave-dwelling alicanto female will lay just two eggs, of gold or silver, depending on the ore it feeds on (lore of Santiago).

[1] But when it notices a human in pursuit, the alicanto (according to the lore of Talagante Province) will turn off the shining of its wings, and scuttle away in the darkness of the night.